— The trip ought not to take more than an hour.
— ____________ . It is at least two hours.

According to the last paragraph, it is important to____________.

1． He used to _______in the sun，but now he is used to _______at night．

The carpenter is directly responsible to ________.

The ship is to leave at eight o’clock. The captain should order at seven “________”.

The boat sailed slowly, keeping ______to the coast as the man in it was afraid of ______the direction.

When the mixture is used, it is important to ______.

The nexttrain to Beijing is ________ to arrive at 9 a.m.

10. ________ it is to jump into the river to swim in summer!

It is___________to?stare?directly?at?the?sun

It is implied in the text that it is hard to ______.

The ship___________at 8:30 ,but it is almost 9:30 now.