They often have three meals day． They have dinner at 6：30 pm every day．（ ）
A．a；aB．a；theC．a；不填
Why have I never seen this kind of 5G mobile phone？
Because it_____by Huawei last week．（ ）
A．was producedB．would produce
C．have producedD．was prodocing
Has Jack solved the difficult math problem？
Not yet． But I believe he_____in a few minutes．（ ）
A．has worked it outB．will work it out
C．was working it outD．works it out
To the students， what should the teacher_____at school？
Of course the ways they study， I think．（ ）
A．give upB．part withC．care aboutD．clear out
Must the children get up at six tomorrow morning？
No， they_____． Let them have a good sleep on weekends．（ ）
A．can'tB．needn'tC．mustn'tD．may not
Have you ever seen the 3D film？
Yes． It can make you_____being in the real situation．（ ）
A．grow upB．look overC．show upD．feel like