Between the two parts of the concert is an interval,__________ the audience can buy ice cream.
Mr. Wang has made up his mind to devote all he could ______his oral English before going abroad.
Tom had no choice but to ________ an excuse to explain his being late.
--Go and ask Mr. White for help. --But I don’t know _____________.
--Jane, are you and your sister on a diet now? -- Yes, I want to lose some weight, and ______.
There is hard evidence ________ the accident was caused by his careless driving.