基础滚动组合练
组合训练（一）
(时间：15分钟)
Ⅰ.单项选择。
( )1.—How is _____ book you read last week?
—It is ______useful book.
A.the;a B.a;the C.the: an D.a;an
( )2.Look!There is a great picture ______ the wall of Mr. Wang’s office.
A.in B.at C.from D.on
( )3.—What do you think of your new teacher?
—He looks very serious ______ actually he is kind.
A.if B.unless C.because D.but
