16．We find such shrubs____ will best stand up to（抵御）hard weather．
A．which B．as
C．what D．who
17. Mrs. Douglas unknowingly left a package____on the shop counter.
A．laying B．to lie
C．laid D．lying
18．____that called this morning？
A．Who was B．Who it was
C．Who was him D．Who was it
19．Earthworms occur_____adequate moisture and food and the necessary soil
conditions are found.
A．and B．whenever
C．however D.wherever
20. None of the soldiers was allowed to open fire unless heavy loss was shown to be___ inevitable．
A.nonetheless B.otherwise
C.hence D.therefore
21．On the giant plane there are___ the jet needs．
上一页 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] ... 下一页 >>