It was for us to solve the math problem, few of us could even understand it.( )
easy enough
enough easy
difficult enough
enough difficult
—Has David finished his project yet? —I guess not. He on it at lunchtime. Do you want me to confirm it?
At this time yesterday afternoon, I____ my bike in the street.A. rodeB. is ridingC. was riding
— Have you seen Lin Feng these days?—I saw him yesterday evening. He _______ basketball with other boys.
—Did you notice a boy in blue come in?—No , I didn't because I ______ a movie.
----Has Jack finished painting the picture yet?---- I’ve no idea. But he______ it the whole afternoon.