按要求改写句子

1. That is an English book.(对划线部分提问)

    ______ ______ in English?

2. The is an orange.(改为复数句子)

    ______ ______ oranges.

3. His backpack is on the chair.(对划线部分提问)

    ______ ______ his backpack?

4. He has a tennis racket.(改为--般疑问句)

    _____ he _____ a tennis racket?

5. -Are those your sisters?(作否定回答)

    -No, ______ ______

脊麻病人注入局麻药7分钟后，脉搏由85次/分降至45次/分，原因是（）

A.反射性迷走神经兴奋

B.心交感神经受抑制

C.用药量过大

D.双下肢肌肉瘫痪

E.副交感神经受到抑制