1 . Although he did not do it___________, he definitely had some responsibility.

A．instantly	B．deliberately
C．accidentally	D．casually

2 . Actually, Einstein’s theory of relativity and his other scientific works are not _______ hard to understand with a little study.

A．such	B．that
C．only	D．thus

3 . As a doctor, I spend most of the time with my patients, and that’s ________ it is in my day.

A．how

B．when

C．why

D．where

4 . To my surprise, I was told my suitcases had _________arrived in Texas Airport instead of Washington Airport.

A．somehow	B．ever
C．even	D．anyhow

5 . Thinking that the students were having an evening class, the teacher left the classroom, _____.

A．slowly and gentle	B．slowly and gently
C．slow and gentle	D．slow and gently

6 . ________ too much exposure to wind may cause the dryness of skin, so too much exposure to the sun may result in cancer.

A．Just as

B．While

C．If

D．Now that