1 . 根据句意，用方框中词组的正确形式完成句子，每个词组只能使用一次。

make sure     a variety of     keep up with     calm down     in case

1. It is important to ________ in dangerous situations.
2. Please remind me of tomorrow’s meeting ________ I forget it.
3. I hope I will develop my competence in solving ________ problems.
4. Xiao Ming tended to study hard every day in order to ________ his classmates.
5. Lots of works were done to ________ the three astronauts on the Shenzhou XIV spaceship could return safely.