Susan decided not to work on the program at home because she didn’t want her parents to know what she ________．

A．has done

B．had done

C．was doing

D．is doing

At last, we found ourselves ________ in a pleasant park with trees providing shade and down to eat our picnic lunch．

A．sitting

B．having sat

C．to sit

D．sat

Jasmine was holidaying with her family in a wildlife park ________ she was bitten on the leg by a lion．

A．when

B．while

C．since

D．once

He was about to tell me the secret ________ someone patted him on the shoulder．

A．as

B．until

C．while

D．when

We were told that we should follow the main road ________ we reached the central railway station．

A．whenever

B．until

C．while

D．wherever

It was ________ back home after the experiment．

A．not until midnight did he go

B．until midnight that he didn’t go

C．not until midnight that he went

D．until midnight when he didn’t go

－Was his father strict with him when he was at school?

－Yes．He had never praised him ________ he became one of the top students in his grade．

A．after

B．unless

C．until

D．when

A good storyteller must be able to hold his listeners’ curiosity ________ he reaches the end of the story．

A．when

B．unless

C．after

D．until

My uncle ________ until he was forty-five．

A．married

B．didn’t marry

C．was not marrying

D．would marry

－You look very tired．________ at all last night?

－No, not really．I’m tired out now．

A．Do you sleep

B．Were you sleeping

C．Did you sleep

D．Had you slept