There ‘s some difficulty in _____ such little children. [ ]

Somebody ______the blackboard．—Well, it wasn’t me．I didn’t doit．

We discussed where to go for a whole morning, but we decided to stay at home_____.[ ]

Where have you been?—- I _______ stuck in the traffic. I ________ here earlier.

I left home, my mother taught me ________somesimple dishes, such as noodles and garlic with vegetables