Jack was a little disappointed，he still went on with his work．（ ）
| A． |
Although |
B． |
Because |
C． |
Since |
D． |
If |
Scientists all over the world are new medicine to fight COVID﹣19.
A．blowing outB．trying out
C．leaving outD．keeping out
It's unbelievable that mountains can grow.According to a recent survey,Qomolangma has risen than before.
A．lowB．lowerC．highD．higher
一What did you do this Dragon Boat Festival？
—I the boat races on TV and read books.
A．watchB．watched
C．am watchingD．will watch
You can't make progress in math learning you work harder.
A．ifB．afterC．unlessD．because
一 ？
一Yes.I'd like a bowl of beef noodles.
A．Can you help me
B．How was your day
C．May I take your order
D．What would you like to drink