【推荐3】如果学生们出了差错怎么办?(what if)
_____ the students ____?

【推荐1】如果他今晚想去香港，除了坐飞机外别无选择。
If he wants to go to Hong Kong tonight, he   ________________ by air. (alternative)
If he wants to go to Hong Kong tonight, he   ________________   by air. (choice)
If he wants to go to Hong Kong tonight, he   ________________   by air. (help)
If he wants to go to Hong Kong tonight, he   ________________   by air. (choose)

【推荐2】这张老照片让她想起了美好的童年。
The old photo _______________ her ________________ her happy childhood.

【推荐2】“there is a need to do sth”意为“有必要做某事”
If the victim is suffering from second or third­degree burns, there is an urgent need to take him/her to the hospital at once.
在我们的生活中我们可能会遇到很多失败，只要我们尽力了，没有必要为这些失败感到遗憾。
In our life we may meet with many failures, as long as we try our best, ________ these failures.

【推荐2】The boy__________________(被发现在偷) apples from the orchard (果园). (根据汉语提示完成句子)

【推荐3】有人连谢谢都忘记说使我确实感到不愉快。
It really _______ me when people forget to say thank you.