1、 Do you know the boy _______ under the big tree? A. lay B. lain C. laying D. lying 2. -What do you think of the book? -Oh, excellent. It’s worth ______ a second time. A. to read B. to be read C. reading D. being reading 3. Go on _______ the other exercise after you have finished this one. A. to do B. doing C. with D. to be doing
核心提示: 1、 Do you know the boy _______ under the big tree? A. lay B. lain C. laying D. lying 2. -What do you think of the book? -Oh, excellent. It’s worth ______ a second ti