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【华慧考博】考博英语每日一练（3.11）考博加油！
1. A solar day is the length of time ______ the Earth to revolve once around the sun.
A. that takes
B. when it takes
C. it takes
D. to take
2. In 1983 the National Science Foundation (NSF), ______ mission is to promote science, took over the network.
A. their
B. that
C. when
D. whose
【考博英语补全句子】
1. In my opinion, you should _________ _________（照管）your child, who often wanders in the streets.
句意：在我看来，你应该照管自己的孩子，其经常在街上闲逛。
2. What can we do for them _________ _________ ________（回报）all the help they have given us?
句意：我们能为他们做些什么来回报他们给我们的所有帮助呢？
