613.Have you checked all the CDs _______ to the mountainous area next week?
A.sent
B.to be sent
C.sending
D.being sent
614.William Beebe,one of the first man _______ the depth of the sea in a bathysphere,got interested in oceanography because of one book.
A.exploring
B.having exploring
C.to be exploring
D.to explore
613.答案是B;根据下文next week暗示，此题应用不定式作定语表示将来。
614.答案是D。
