This could have been solved more quickly by writing the following expression(表达式).
举一反三
- We wish the work could ______ more quickly, but we'd had some difficulties in getting the right kind of supplies. A: have done B: have been done C: have been doing D: be done
- —Could I use your car tomorrow morning—Sure. I________are port at home. A: will be writing B: will have written C: have written D: have been writing
- could not have solved是不可能解决
- You ____ have been more considerate. A: could B: can C: will D: shall
- If he had been in better health, he ______ more books. A: can write B: could have written C: could write D: have written