It _____ me two hours to help Mary with her math last Saturday．（ ）
A．tookB．spentC．paid
David is crazy about Chinese history． He ______ visits the museums first wherever he travels in China．（ ）
A．neverB．seldomC．sometimesD．always
My uncle's reviews on the four great classical Chinese novels may be published _____ the summer of 2021．（ ）
A．inB．onC．atD．for
Tom was happy to get a chance to play _______ football for the school team．（ ）
A．aB．anC．theD．不填
It was a fantastic trip．So， which city did you like best， Wuhan， Chengdu or Chongqing？
______．There were good things and bad things about them．
（ ）
A．No problemB．It is hard to say
C．Enjoy yourselfD．You must be joking
Many Chinese characters symbolise their meanings， unlike English words which are spelt out according to how they sound．
The underlined word "symbolise" in the sentence is a（n）________．（ ）
A．nounB．verbC．adjectiveD．adverb