________ you have seen things like these before doesn't matter.
| A．If | B．Whether | C．What | D．When |
He is in deep sorrow, so it is not a(n) time to mention the subject.
| A．evident | B．typical | C．appropriate | D．wonderful |
He bought his girlfriend diamond ring, but he was told that diamond in that ring was an imitation glass.
| A．a; the | B．a; / | C．the; a | D．/; the |
— Doctor, I feel so nervous.
— . It’s just a small operation.
| A．No way | B．Take it easy | C．That’s right | D．All the best |
Mary received training in business English for three months, ____she found a job in a big foreign firm.
| A．after that | B．after which | C．after it | D．after when |
When asked why he went there, he said he was sent there ______for a space flight.
| A．training | B．being trained | C．to have trained | D．to be trained |