______ I admit that the problems are difficult, I don’t mean that they cannot be solved.
| A．Unless | B．While |
| C．Since | D．When |
The two sportsmen congratulated each other ____ winning the match by shaking hands.
| A．with | B．on | C．in | D．to |
He began to take political science _________ only when he left school.
| A．strictly | B．truly | C．carefully | D．seriously |
Yesterday I went to see him, _________ that he had gone abroad two days before.
| A．only to learn | B．to learn only | C．only learned | D．only learning |
. – What are you reading, Tom?
-- I’m not really reading, just ___ the pages.
| A．turning off | B．turning around | C．turning over | D．turning up |
----Sorry, sir! Your flight has taken off five minutes earlier.
----____________. I wasn’t informed of that at all.
| A．You must take charge of it. | B．Wait for your punishment. |
| C．I’d like a refund, please. | D．I won’t agree with that. |