281. Many hands make light work.__________ is strength.
| A．Union | B．Nation | C．Uniform | D．Unifying |
She never dreamed of________________ a chance for her to meet her old friends again．
| A．there was | B．there being | C．there to be | D．being |
The baby is due in May．________________the new house should be finished．
| A．by then | B．by which | C．by when | D．since when |
My headache _________ me．I thought it was going away, but it’s getting worse and worse．
| A．killed | B．kills | C．is killing | D．was killing |
What I need is ___________ book that contains _____ ABC of English grammar．
| A．a; the | B．the; 不填 | C．the; an | D．a; 不填 |
—Did he come back late last night?
—No．It was not yet eight o’clock _____________ he arrived home．
| A．before | B．that | C．until | D．when |