I think it ______ that one have a good command of English if one wants to be engaged in international trade.
| A．useful | B．a must | C．essential | D．vital |
—I am thinking of the test tomorrow. I am afraid I cannot pass this time.
—_________! I am sure you will make it.
| A．Go ahead | B．Good luck | C．No problem | D．Cheer up |
Passed from father to son, the music has not changed for eight centuries，and among the richer Naxi people, ________ knowledge of this music showed that you were ________real gentleman.
| A．a; a | B．the, 不填 | C．不填;a | D．the; the |
Sometimes I’m dying ______ him about it.
| A．tell | B．to tell | C．telling | D．of telling |
Wherever such an area is located, it will be immediately ______ by the enemy if armed forces are lacking.
| A．taken | B．caught | C．occupied | D．kept |
His hard work paid______ when he got the result.
| A．back | B．over | C．off | D．for |