已知直线l1:4x－3y＋6＝0和直线l2:x＝－1，抛物线y2＝4x上一动点P，P到直线l1和直线l2的距离之和的最小值是（ ）
If you want to know more about space，please ___________ the book A Brief History of Time．（ ）
A．look throughB．look around
C．look afterD．look down upon
It's very kind ___________ you to lend me your reusable shopping bags．（ ）
A．ofB．forC．toD．with
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
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