《工程款支付证书》是由监理工程师签发给()的。
A、建设单位;
B、承包单位;
C、监理机构;
D、造价咨询单位.
参考答案:A
The style of Western art has changed many times ______ Chinese art has changed less often.
A.while
B.before
C.since
D.however
He _____ his homework at school. [ ]
A. doesn’t do
B. don’t does
C. isn’t do
D. does not