第二节 语法和词汇知识(共15小题;每小题1分,满分15分)从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。—What' s ____ population of China?—As far as I know China has ____ population of about1. 3 billionA. a; the B. a; a C. the; the D. the; a
Without proper lessons, you could _________a lot of bad habits when playing the piano.
The college has developed an on-line system ________students can choose their own professors.
As a doctor , it’s against my ______ to accept gifts from patients.
In communication, a smile is usually ______ strong sign of a friendly and ______ open attitude.
The Wangs are considering ______ to Huangshan for a trip at five tomorrow morning.