【题目】In the 1950s in the USA, most families had just one phone at home, and wireless phones _______ yet.

A. haven’t invented B. haven’t been invented

C. hadn’t invented D. hadn’t been invented

【题目】ten ÷ five ＝________ A．three B．two

【题目】If the new safety system _______ to use, the accident would never have happened.

A. had been put B. were put C. should be put D. would be put

【题目】选择每组中不同类的单词，将其序号填在括号里。

（ ）1.A.stayed B. danced C. eating

（ ）2.A.yesterday B. last Sunday C. Saturday

（ ）3.A.bigger B. made C. cleaned

（ ）4.A.was B. am C. are

（ ）5.A.went B. got C. lives

【题目】seven ＋ five ＝________ A．eleven B．twelve

【题目】Samuel, the tallest boy in our class, ______ easily reach the books on the top shelf.

A. must B. should C. can D. need

【题目】______ birds use their feathers for flight, some of their feathers are for other purposes.

A. Once B. If C. Although D. Because

【题目】Jane moved aimlessly down the tree-lined street, not knowing ______she was heading.

A. why B. where C. how D. when