Miss Green goes to the doctors ________ Monday mornings.

Nobody likes , so we should be kind to everyone. — I agree with you.

I can still remember that it is since the 1990’s, _____ we began to use cell phones,_______ the number of mobile users has greatly increased

Peter’s father asked him to spend his time on something________researching into instead of playing all the time.[ ]

Kate, do you know__________it is from here to the gym.–About twenty minutes’ walk.