It is difficult to send people to other planets because of__________.[A]the lack of capacity of space exploration vehicles[B]the financial expenditure involved in space travel[C]controversial nature of space travel[D]the uncertain future of space exploration
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——Isn't that Ann's husband over there?——No, it __________ be him——I'm sure he doesn't wearglasses.[A]can't [B]must not[C]won't [D]may not
听第7段材料,回答3~5题。 Where are they most possibly? [A]At the post office. [B]At a bookstore. [C]At the bank.
How many students were shot dead in l997 in USschools?[A]10. [B]9. [C]12. [D]22.
The horse is getting old and can't run__________ itdid.[A]as faster as[B]so fast than[C]so faster as[D]as fast as