1.ass_stant,  inv_stigation,  f_rst of all,  s_fe,  

_sk,  s_arch,  f_ngerprints,  f_otprints,  m_gnifying glasses,  

f_rtunately,  unfortunat_ly,  cl_e,  clu_less,  ev_dence,  

t_rch,  ch_w,  g_m,  sh_ut,  b_rn.

2.

When were you born?

I was born in/on ………..

When were you born?

I was born in 2001.

When were you born?

I was born on July 5th 1993.

When was …….. born?

He/She was born in/on ………..

When was Peter born?

Peter was born in 1986.

When was Alice born?

She was born on April 1st 2011.

3.

What were/was …….. doing when ……… was born?

……….. were/was ……….

What were you doing when your sister was born?

I was studying at school.

What was your grandma doing when you were born?

She was waiting in the hospital.

4.

What were/was …….. doing on ……………..?

……….. were/was ……….

What was Soviet Union doing on April 4th 1957?

On April 4, 1957, Soviet Union was launching the first satellite into space. 

What was Soviet Union doing on April 12th 1961?

On April 12, 1961, Soviet Union was launching astronaut Yuri Gagarin into space.

What was Astronaut Alexey Leonov doing on March 18th 1965?

On March 18, 1965, Soviet astronaut Alexey Leonov was making history’s first spacewalk.

What was Neil Armstrong doing on July 20th 1969?

On July 20, 1969, Neil Armstrong was walking on the Moon.

What was Soviet Union doing on April 19th 1971?

On April 19, 1971, Soviet Union was launching the world’s first space station.

5.例句:

I need an assistant who speaks Japanese.

The police had to do their investigation.

First of all, let me say that I’m sorry for what happened yesterday.

Please, after unlocking the safe don’t forget to close it.

If there’s anything you want, just ask me.

He searched everywhere, but couldn’t find his wallet.

Tom wiped his fingerprints off the knife.

There are footprints of a cat on the table.

These letters are too small to read, you should use a magnifying glass.

Fortunately the teacher didn’t notice me sleeping during the class.

I really like this watch, but unfortunately it’s just too expensive.

Police has no clue where the criminal is.

He is clueless about our culture and history.

The lawyer brought up new evidence.

Can you pass me the torch, please?

Does your tooth hurt when you chew?

You have some gum stuck to your shoe.

I shouted for help, but nobody came.