题目内容

26. Not until we had reached the mountain top___________how high we had climbed.

A)did we realize
B) we did realize
C) do we realize
D)we realize

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27. The doctor told us it was a robot___________performed the surgery.

A)whom
B) that
C)which
D)what

28.If I_______________the manual earlier,I would have been able to fix the machine.

A)got
B)get
C)have got
D)had got

29.____________self-driving cars are coming, the concept of driving will change dramatically.

A)Now that
B)Even though
C)In case
D)As if

30.Students_____________careers in international business can turn to us for help.

A) pursuing
B) pursued
C)pursue
D) have pursued

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