To keep children safe，we ___________ put the things like knives and medicine away in our house．（ ）
A．mayB．shouldC．canD．might
For more than once，our head teacher asks us ___________ the habit of keeping a diary．（ ）
A．developB．developsC．developingD．to develop
We can collect rainwater when it rains ___________，and use it to water plants．（ ）
A．softlyB．heavilyC．noisilyD．quietly
﹣Is there any outdoor learning in your school？
﹣___________．We learn outdoors once or twice every month．（ ）
A．Yes，there isB．No，there isn't
C．Yes，it isD．No，it isn't
It's believed that playing computer games too much does ___________ harm than good．（ ）
A．manyB．muchC．moreD．most