洞内施工测量,供导坑延伸和掘进用的临时点,可用中标定,其延伸长度在直线部分不应大于( )。
A.40m
B.50m
C.30m
D.60m
参考答案:C
We have been informed that he had done _____ visits were essential by eleven o'clock last night. [ ]
A. all
B. what
C. that
D. all that
My family as well as I ____ glad to see you.[ ]
A. am
B. are
C. is
D. was