Question

____a very large substitution base and future opportunity. A.It has B.They have C.It remains

D.There remains
选哪个？为什么？

Answer 1

选者D, 考点在there 句型中谓语动词是BE动词,有时可以是seem to be, happen to be, is likely to be，或半系动词remain, stand, lie, go,exsit, follow, live, come,occur等词．
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Answer 2

C