不动产评估中有很多的原则，包括供求原则、竞争原则、替代原则、预期原则等，这些原则的共同之处在于直接或间接地影响某项资产的效用或生产能力，因此，可以认为不动产的效用反映了所有影响不动产价值的市场因素的综合作用。 （）此题为判断题(对，错)。

We shall probably never be able to ______ the exact nature of these sub-atomic particles.

A．assert

B．impart

C．ascertain

D．notify

A.realize

B.accomplish

C.complete

D.finish

We shall advise you ____ we are able to supply the goods again.

A. as

B. while

C. as soon as

D. until

He must give us more time,________we shall not be able to make a good job of it.

A．consequently

B．otherwise

C．therefore

D．doubtlessly

—Let’s go swimming, shall we？ — ___.

A、No. We don’t.

B 、Never mind.

C、Yes. Let ’s go.

D、Sorry to hear that.

"We could afford" in Paragraph 3 probably means ______.

A．we were able to buy

B．we were able to spend

C．we were able to bear

D．we were able to give

He must give us more time,________we shall not be able to make a good job of it.

A．consequently

B．otherwise

C．therefore

D．doubtlessly

We trust that you will be able to accept our offer, which shall() against reply by cable

A、kept open

B、keep valid

C、be kept firm

D、be keeping open

______ for your help, we' d never have been able to get over the difficulties.

A．Had it not

B．If it were not

C．Had it not been

D．If we had not been

He must give US more time,______we shall not be able to make a good job of it.

A．consequently

B．otherwise

C．therefore

D．doubtlessly