问题

The scientist _ Canada and he will giveus a talk when he _ back

A:to answer
B:to beanswered
C:answering
D:beinganswered

正确答案是：

同类题型

When John _______ Paris，he went to see the Eiffel Tower.

Is this the school ________ you studied ten years ago?[ ]

What makes you so happy today, Jack — Because my teacher says I am __________ honest boy.

The teacher said that they ______ hard-working students.

She is not interested _____ math at all.