单选题：When ___help, one often receives"Thank you!" or "It's ki..

The new library, ______ last week, is very popular _____ the students.[ ]A. opening, to B. opened, with C. open, to D. having been opened, among

Without facts,we cannot form a worthwhile opinion,for we need to have factual knowledge ______ our thinking.A．upon which to baseB．which to be based onC．which to base onD．to which to be based on

Though _____ in San Francisco, Dave Mitchell had always preferred to record the plain facts of small-town life.A．raisedB．grownC．developedD．cultivated

____to reach them on the phone, we sent an e-mail instead.A. Fail B. Failed C. To fail D. Having failed

With the world changing fast, we have something new _______with all by ourselves every day.A．dealB．dealtC．to dealD．dealing