So suddenly _____ that I hadn’t preparedfor it. What a pity I had let it go!

This book is written in _____easy English as beginners can understand [ ]

________ to use in April, 2010, the road has solved the long-standing problem of traffic jamsof this area.

Why didn’t you answer the phone last night?—I ___ when you called. [ ]

These tax laws which are intended for domestic companies do not _____ to foreign companies.