.---Did your father come back early last night?
---Yes. It was not yet eight o’clock ______ he arrived home.
| A．before | B．when | C．that | D．until |
. It is believed that this book is ______worth reading than that one.
| A．more | B．better | C．quite | D．most |
Two middle-aged passengers fell into the sea. _______, neither of them could swim.
| A．Actually | B．Unfortunately | C．Naturally | D．Luckily |
It was last night _______ I read about the history of English.
| A．that | B．which | C．what | D．when |
They found the remains of buildings _______ under the sand, together with a lot of treasures.
| A．being buried | B．buried | C．to be buried | D．burying |
It is not Tom but you who _______ to blame for the accident.
| A． is | B．was | C． are | D．is going to |