(届北京市东城区普通校高三3月联考英语试卷)He seems too tired today, and I wonder _________ he got a good sleep last night.
22.After playing in the park for a few hours, the pupils gathered under trees _______shade and ________ down to eat their picnic lunch.
21.It was not until dark ____ he found ____ he thought was the correct way to slove the problem.
20.—Though it is 30 years _____ we last met, I still remember the scene _____ we got separated on a rainy day.
19.—My cat’s really fat. —You ______ have given her so much food.
18.—Jim, are you ______ this Saturday?—Oh, sorry. I need to go to the bookshop _____ the bank on Saturday.