—Mum, it is nice weather. I want to skate this afternoon.
—Don't you think the ice on the lake is too thin to ______ your weight

单项选择题The students spent as much time getting trained as they () studying.

A. disliked
B. were
C. had
D. did

单项选择题Whether by accident or ______, he arrived too late to help us.

单项选择题Thank you for sending us () fresh vegetables of many kinds. You have done us () great service.

A. / a
B. the a
C. / /
D. the /

单项选择题If Newton lived today, he would be surprise by what () in science and technology.

A. had discovered
B. had been discovered
C. has discovered
D. has been discovered

单项选择题Which of the following statement is INCORRECT