—Did you have any difficulty catching yesterday’s lecture?
—No. The professor spoke very clearly to make his speech easy _____.
| A．understood | B．understanding | C．to be understood | D．to understand |
He gave the old couple a lot of money and didn’t expect to receive anything ______for them.
| A．in all | B．in fact | C．in return | D．in short |
The math problem seems very easy, but in fact it is very difficult_______.
| A．to work out | B．being worked out | C．working out | D．to be worked out. |
-----What did you think of Mount Tai?
------Wonderful. It’s worth ______once again.
| A．being visited | B．to visit | C．visiting | D．visited |
In the past twenty years, the sad father has been to many places-______his lost son.
| A．in face of | B．in favor of | C．in charge of | D．in search of |
—Isn’t that Ann’s husband over there?
—No, it ______ be him-I’m sure he doesn’t wear glasses.
| A．can’t | B．must not | C．won’t | D．may not |