When________, the wholesale vegetable market will be the largest one in China[ ]

Iappreciated ____ the opportunity to study abroad two years ago.

Having walked in the desert for several days, we felt exhausted, but we had to find a pool before water in the bottle ____.

After the education reform(改革) in Jiangsu Province, the pupils have_______ time to relax and _______ homework to do.

Why not go and have dinner in a restaurant? — _________. It’s too expensive.