At the age of 29, Dave was a worker, ________ in a small apartment near Boston and ________ what to do about his future.
Neither Join nor I ______able to persuade Richard’s grandfather to attend the wedding.
My dictionary has disappeared. Who ________ have taken it?
I looked under ______ bed and found _____ book I lost last week.
--- How long are you staying? --- I don’t know. _____.
It is reported that large amounts of locusts(蝗虫) _____ in their activity in the north now.