Having a trip abroad is certainly good for the old couple, but it remains_________ whether they will enjoy it.

What field will your son go into after graduation from Nanjing University?— I’m not quite certain, but he ________ a good teacher of English. [ ]

admitted to our school two years ago, a top school in our hometown, _____ he has been crazy about reading electronic novels, killing time.

The big flood last week affected (影响) _______ people’s lives, and _______ them died.

Victor has ______ aunt and two uncles.