I can never forget the days _____ we worked together and the days _____ we spent together.A. when; which B. which; when C. what; that D when; when
____ you have the chance to go to university in the future, you must take it.
---When do you think we can meet again? --- Well, anytime you feel like ______.
Thank you for your help. ______ for your help, I wouldn’t have succeeded in my experiment.
There is a dog over there. Look, out______. Be careful!
As your spoken English gets better, _______ your written English.