He _______ busy yesterday, or he _______ you with your experiment.A.was; had helpedB.was; would have helpedC.had been; would have helpedD.were; would have helped
参考答案:
Don't be angry with us. We ________ with you together, but..
Don't be angry with us. We ________ with you together, but we were busy with our final reports when you called in.A.would eat outB.must have eaten outC.should eat outD.could have eaten out