Some companies have introduced flexible working time with less emphasis on pressure ____.
| A．than more on efficiency | B．and more efficiency |
| C．and more on efficiency | D．than efficiency |
______ a certain doubt among the parents as to the necessity of children's doing so much homework.
| A．It existed | B．There had |
| C．There existed | D．It had |
I’m going to spend the summer holiday in Hainan,________ lives my uncle.
| A．where | B．who | C．which | D．when |
From his expression, I don’t think he could have finished his homework last night, _______?
| A．couldn’t he | B．do I |
| C．did he | D．hasn’t he |
, I believe, and you will find the boy is very outgoing.
| A．Having a talk with the student |
| B．One talk with the student |
| C．Given a talk with the student |
| D．If you have a talk with the student |
---People often don’t appreciate what they have, do they? ---No, _______ they lose it.
| A．if | B．after | C．until | D．when |