It is not uncommon for there______problems of communication between old and young.A．isB．to

It is not unusual for workers in that region ____

It is not unusual for workers in that region _____

If someone is in the United States for good, it means he is there ______.A．to do goodB．tem

It _____ for an emergency generator to require paralleling.A.is usualB.is not usualC.is ne

There is______man downstairs waiting for you.A．anyB．someC．fewD．not

It is not, by no means, the worlds oldest company. There are 【M1】______ Japanese hotels d