It was about 600 years ago _____ the first clock with a face and an hour hand was made .
| A．that | B．until | C．before | D．when |
The driver was at _____ loss when ______ word came that he was forbidden to drive for speeding.
| A．/;the | B．a; the | C．/; / | D．a; / |
One of the most important things in education is to let students ____ positive emotions and experience in the process of their learning.
| A．require | B．acquire | C．demand | D．clarify |
––– I felt left out at the party last night.
––– Really? ____, you should have said something.
| A．If possible | B．If so | C．If necessary | D．If any |
Where were you at supper time? I ____ for you to join me.
| A．waited | B．had waited | C．have been waiting | D．was waiting |
––– I promise my daughter ____ get a nice present on her birthday.
––– I think it will be a big surprise to her.
| A．must | B．shall | C．might | D．need |