They went to Beijing ______ a rainy night. [ ]

We should protect the animals _______ danger. [ ]

.在字母表中,______和______ 两个字母可以单独成词。

We’ll study in different schools next term. Enjoy your time in the new school.— .

Listen! There is a knock on the door．Who _____ it be?—It must be Jack．Just now I sent for him．