Have you decided ____________ on April 1st—I will put a piece of paper which says “Hi” on my brother’s back.

e was doing the cleaning yesterday, Mum found the ring that she _____ yearsago

We are no in the age of great changes. Everything sometimes ________ before it is felt.

Since you have made such good preparations,there _______ be any problem about passing the coming exam.

Stop _____,let’s listen to the teacher.