So absorbed _____ in the experiment that he didn’t even notice it was already over 12 o’clock.
| A．did he | B．he did | C．was he | D．he was |
Though the professor tried his best to explain the difficult question, the students still looked _____.
| A．confusing | B．being confused |
| C．to confuse | D．confused |
Look! What has happened. I’d rather you ______ her about the bad news.
| A．would not tell | B．hadn’t told |
| C．didn’t tell | D．hasn’t told |
Every man worker and every woman worker _____ free medical care. At Christmas each boy and each girl ___ given a present.
| A． enjoy; is | B． enjoy; are |
| C．enjoys; are | D． enjoys; is |
Don’t be worried. I’ll ________ your pet dog when you’re away.
| A．deal with | B．care about |
| C．look into | D．care for |
Only after the woman had her own child ________ how difficult it was to be a mother.
| A．she realized | B．had she realized |
| C．she had realized | D．did she realize |