It will be some years before some foreign doctors change the impression they have _____Chinese medicine, _____, in their opinion, is nothing but raw herbs（药草） and not effective at all in treating diseases．
A．for; which B．on; what C．to; that D．on; which
________confidence and the necessary equipment, they failed to rescue the 42 miners trapped in the coal mine．
A．Lack of B．Lacking of C．Lacking D．Having lacked
______ many times, he finally understood it.
A．Told B．Telling
C．Having told D．Having been told
The pilot asked all the passengers on board to remain______ as the plane was making a landing.
A．seat B．seating C．seated D．to be seating
It is reported that a province has ______ to form a new state.
A．broken down B．broken up C．broken away D．broken out
Construction workers usually get ______ by the day.
A．pay B．paying C．paid D．to pay
