在继电器内有气体需要进行取气样或排气时，通过导气盒上的（）进行放气或取气。

A. The man is unwilling to lend his tools to other people.
B. The man has not finished fixing his bookshelf yet.
C. The tools have already been returned to the woman.
D. The tools the man borrowed from the woman are missing.

A. The man received the note.
B. The man didn't receive the note.
C. The woman forgot all about the note.
D. The woman didn't send him a note.

A. The man had too many dreams when sleeping.
B. The man has never been to Shanghai.
C. The man didn?t pass the exam because of illness.
D. The man has been to Shanghai once.

A. 9:00
B. 9：30
C. 10:00
D. 10:30