-- _________ you called yesterday?
-- Tom．Why?
| A．Who it is that | B．Who is it that | C．Who was it that | D．Who it was that |
The rescue team made every __________ to find the missing mountain climber.
| A．force | B．energy | C．effort | D．possibility |
"Please __________why you're so late," said his girlfriend.
| A．excuse | B．explain | C．apologize | D．tell |
I'm sorry. I _____________ you__________ to me.
| A．don't know; are speaking | B．don't know ;were speaking |
| C．didn't know; were speaking | D．didn't know; are speaking |
--Hi, Tracy, you look tired.
--I am tired. I__________ the living-room all day.
| A．painted | B．have been painting |
| C．had painted | D．have painted |
You should take the medicine after you read the __________.
| A．lines | B．instructions | C．words | D．suggestions |