—How many times have you been to China? —In fact, it is the first time I __________ here.

The teacher told the students that there          a meeting at three o’clock.

We all thinks that Jack ____________ for his son’s bad performance at school.

I preferred _______the long jump rather than ________ in the relay race in the school sports games.

There’s no doubt _____enough concern must be paid to the problem of the stay­at­home children.