-Do you know_______ second-hand smoke?
-To protect our health and memory.
| A．how we should prevent | B．why should we prevent |
| C．why we should prevent | D．how should we prevent |
-Look at this picture. There is a bridge_______ the river, and there are three birds_______ the tree.
| A．on； in | B．over； on |
| C．over； in | D．on； on |
-Sandy, do you like English?
-Yes, I spend half an hour_______ English every day.
| A．practise speaking | B．practising speaking |
| C．ptractise speak | D．practising speak |
The girl is_______ to go to school by herself.
| A．enough old | B．enough big |
| C．old enough | D．big enough |
_______ packets of salt do you want?
| A．How much | B．How many | C．How | D．What |
Linda is my cousin. She likes playing _______, but I like playing _______.
| A．the piano； the football |
| B．piano； the football |
| C．the piano； football |
| D．piano； football |