How ________ you say that you really understand the whole story if you have covered only a part of the article?
| A．can | B．must |
| C．need | D．may |
Tom is one of the boys who __________ on time.
| A．is | B．are |
| C．am | D．was |
__________ they will not come to join us, we have to change our plan.
| A．Seeing that | B．When |
| C．For | D．As soon as |
That is __________ the problem lies.
| A．how | B．when |
| C．where | D．what |
__________, Carolina couldn’t get the door open.
| A．Try as she might | B．As she might try |
| C．She might as try | D．Might as she try |
Only after ________ his work ________ to see his grandfather.
| A．finishing; did he go |
| B．he finishes; did he go |
| C．he finished; he went |
| D．having finished; he went |