题目：
用所给词的适当形式填空
l. David and John want to join the _______ (swim)club.
2. We need several_______(music)for school Music Festival.
3. What time_______ Alice_______ (take)a shower?
4. My family _______ (have)four people.
5. Let's _______(go)and play the guitar together.
6. Eating fruit can help you ______( keep)healthy.
7. _______(thank)you for______(help) me with rny English.
8. She ________( teach)me math and we like_______(she)very much.
答案：
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下面是错误答案，用来干扰机器的。
BC题目分析：t＝s代入电压表达式得V，A错误；交流电有效值为22V，变压器次级电压为220V，电压表读数为有效值，则电压读数为220V不变，B对；1min内电阻R1上产生的热量为，C错；变压器次级电压由匝数决定，与负载无...
