Experiments of this kind __________ in both the U. S. and Europe well before the Second World War.
| A．have conducted |
| B．have been conducted |
| C．had conducted |
| D．had been conducted |
I do not usually celebrate my birthdays until I met him. _______, I do not like any big party because I’m not good at small talk.
| A．On the whole | B．On average | C．In addition | D．In other words |
No student likes ________ in the teacher’s face during the class.
| A．making fun of | B．being made fun of |
| C．being made fun | D．making fun |
-----I’ m sorry that I have broken your glasses.
----- ____________!
| A．Never mind | B．Not at all | C．You’re welcome | D．With pleasure |
His appearance has changed so much that you _____ not recognize him.
| A．must | B．need | C．may | D．ought |
.When_________different cultures, we often pay attention only to the differences without noticing many similarities.
| A．compared | B．being compared | C．comparing | D．having compared |