A.does
B.do
C.has done
D.have done
[单选题]There are[various] ways of solving the problem.A.variedB.changedC.different
Only after a heated discussion()in solving the problem.A. they did succeedB. did
It is clever ______ you ______ out the problem.A. for; to workB. of; workingC. f
He suggested ____ a meeting to discuss the problem.A. holdB. to holdC. holdingD.
[单选题]The harder Itried, _____ it seemed to solve that math problem.A.the impossi
[单选题]The harder Itried, _____it seemed to solve that math problem.A.the impossib
This is the best way I can think of _______ the problem.A. solveB. to solveC. so
[单选题]His experience abroad provides a wider __________on the problem.A.privilege
[单选题]The government is trying its best to improve the( )problem.A.houseB.househo
[单选题]He lay awake all night, ( )the problem.A.think ofB.to think aboutC.thinking