从所给的四个选项中，选择最合适的一个填入问号处，使之呈现一定的规律性（）
A.选项A
B.选项B
C.选项C
D.选项D
参考答案：A
下行船在弯曲河段航行。操作不当，在（）影响下，易造成船舶偏航，导致输向落弯。
A.内拖水
B.扫弯水
C.滑梁水
D.背脑水
根据图画提示，完成对话。
A: Where's Bill? I can't find him.
B: I don't think he can 1 .
A: Why not?
B: He has to 2 .
A: What's wrong 3 ?
B: She doesn't feel 4 .
A: I'm sorry to 5 . Did she go and 6 ?
B: Yes.
A: What did the doctor 7 ?
B: The doctor said 8 but she has to rest.
1. ______ 2.______ 3.______ 4.______
5.______ 6.______ 7.______ 8.______
