(2013·重庆模拟)—When did your brother begin to show his interest in medicine?
—It was a Saturday he noticed his classmate experimenting on a frog in the lab.
| A．that | B．what |
| C．when | D．which |
相关试题
----I heard that as many as 24 people were killed in the big fire.
----Yes,news came as surprise to us.
| A．a; a | B．the; / | C．/; a | D．the; a |
----I am sorry to have been so rude to you.
----____________.
| A．No matter | B．All right |
| C．You are welcome | D．That’s all right |
I was reading attentively in my own room ________ suddenly he knocked at the door.
|
He has five___________ , and they
are all doctors working in the same hospital .
|
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