他经常怀疑是否值得如此勤奋学习。
He often doubts whether it is worth studying hard.
Tom经常和他弟弟为看什么电视节目而争论。
Tom and his brother often argue about what TV program to see.
爷爷别无选择，只能把自己的房子卖了。
Grandpa has no other choice but to sell his house.
he often doubts whether it is worth studying so hard
tom and his brother often argue about watching what tv shows
grandpa had no choice but to sell his house
He often doubts whether it is worthy working so hard.
Tom and his brother always argue about watching which TV program
Grandpa has no choice but to sell his house.
it it worthwhile to study so deligently.
Tom and his brother often argue about which TV program to watch
Grandpa have no choice but to sell his house.
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