登录
用括号内所给单词的适当形式填空。
Last week, our team 1. (prepare) for the chemistry experiment. But when Li Lei 2. (pour) the liquid, nothing happened! What could we do to make it work? We realized we 3. (use) the wrong chemical earlier. Sarah remembered she 4. (leave) the instruction sheet at home. How careless she was! Quickly, we 5. (check) the steps online and redid the test. Purple smoke finally rose — our experiment worked!
Last week, our team 1. (prepare) for the chemistry experiment. But when Li Lei 2. (pour) the liquid, nothing happened! What could we do to make it work? We realized we 3. (use) the wrong chemical earlier. Sarah remembered she 4. (leave) the instruction sheet at home. How careless she was! Quickly, we 5. (check) the steps online and redid the test. Purple smoke finally rose — our experiment worked!
答案
1. prepared
2. poured
3. had used
4. had left
5. checked
2. poured
3. had used
4. had left
5. checked
