A PIN is necessary for______.A．the activation of your credit cardB．online shopping with a

It is necessary __________ the book immediately.A、that he returnsB、his returningC、for hi

I don’t think it necessary（discuss) _________the the problem is settled.

Each journal and pin should be examined for _____ and grooving.A.bridgesB.recessesC.rearsD

It is necessary for the ship to contact ____ for authorization prior to undertaking mitiga

The opening ceremony is a great occasion; it is essential ______ for that.[2003]A．for us t

Knowledge is a comfortable and necessary retreat and______for us in an advanced age; and i