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
How does the banana milk shake______？
Delicious． I'd like to have another glass．（ ）
A．lookB．smellC．tasteD．sound