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y eraser? 2.她的鑰匙在書包里。 in ( )10.—Is your book in your bookcase? —________. I lost it this morning. A. Yes, it is B. No, it isn39。 on C. on。 their ( )8.—Come________, Tom! —OK, Mom! A. on B. of C. to D. at C A 第 1課時分層訓(xùn)練 ( ) apples are________ the tree and a cat is ________ the tree, too. A. on。 they C. they。 ( )7.—Are________ Grace and Emily? —Yes, and this is________ friend, Ann. A. they。t C. Yes, she is D. No, he isn39。 ( )6.—Is the ball on the chair? —________. It39