Must I clean the room now，Mom？
No，_________．（ ）
A．you mustn'tB．you needn't
C．you can't
The children are jumping excitedly because they have _______ the design perfectly in groups．（ ）
A．completedB．controlledC．contactedD．caused
Max got lost and was trapped in the forest for 10 hours _______ a farmer nearby found him．（ ）
A．ifB．sinceC．untilD．after
Wow， eighteen pink roses! For whom？
________ are for my mum， and the other nine are for my grandma．（ ）
A．FewB．HalfC．ManyD．Most
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