They were ( ) for his help.A.thanks B.thank C.thanked D.thankful

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They were ( ) for his help.A.thanks B.thank C.thanked D.thankful

They were ( ) for his help.A.thanks B.thank C.thanked D.thankful
They were ( ) for his help.
A.thanks B.thank C.thanked D.thankful

They were ( ) for his help.A.thanks B.thank C.thanked D.thankful
D.thankful
be thankful for固定短语,

D
be thankful for

thankful
be thankful for 为...感到感激 的意思
其他的短语都不存在

第一

They were ( D ) for his help.
A. thanks B. thank C. thanked D. thankful
因为be thankful for sth.
意思是:对···很感激

D 感激的
他们感激他的帮助
其他选择在词性和语法上都不对!