A.pay off B.pay back C.pay for D.pay down
单项选择题Many people believe we are heading for an environmental disaster(灾难) ()we radically(根本地) change the way we live.
A.but B.though C.unless D.in case
单项选择题It's good that we ()to the park because it's started to rain.
A.don' t go B.hadn' t gone C.didn' t go D.wasn' t going
单项选择题All the girls swam in the lake except two, who()halfway.
A.gave off B.gave up C.gave away D.gave out
单项选择题--I called you yesterday. A woman answered, but I didnt recognize her voice. --Oh, it ()my aunt Jean.
A.must be B.must have been C.might be D.can have been
单项选择题What()you do this Sunday if it ()
A.do, will rain B.will, rain C.do, rains D.will, rains