We use plastics _________ wood and metal now.A. t

We use plastics__________ wood and metal now．A.to take placeB.to take over###SXB#

With the risks obvious and growing, a cautious person______an insurance policy now.A．has t

We ________ in a small village in the countryside. Now we all live in cities.A. used t

Weve signed an agreement and we cant______of it now.A．back downB．back offC．back upD．back o

They tried to ____ hard plastics for metals in manufacturing machine parts. [ ]A. replace B. substit

I wonder why Jenny ________ us recently. We should have heard from her by now. A.hasn’t writtenB.doe