【题目】The trees are burning. Hurry to________ the fire, please.

【题目】There is ________ “o” and ________ “u” in the word “course”.

【题目】 the students in our city will take part in the writing competition next month.

【题目】Do you want to be healthy? ________. Smiling can help you stay healthy.

【题目】―I didn’t pass the driving test again.

【题目】You must be careful ________ electricity. It's dangerous.

【题目】Judy hurt her arm in an accident. Luckily, it is not ________．

【题目】They are _________ busy because they have ________ work to do all the time.

【题目】—Jenny said she _________ a bad cold for a week.

【题目】Stay away from the fire, _______ you’ll get burned sooner or later.