Jack often plays _____ piano and he wants to be a pianist when he grows up．（ ）
A．aB．anC．/D．the
As China grows stronger and stronger，Chinese ______ in more and more schools out of our country．（ ）
A．teachesB．is taughtC．has taughtD．was taught
I didn't believe I could do it ____ I got to the top of Mount Tai．（ ）
A．unlessB．untilC．afterD．as
______ exciting the speech about"Belt and Road"was!
Of course!It was a really great inspiration to the world．（ ）
A．HowB．WhatC．How aD．What an
With the development of science and technology，robot cooks ______ in our families in the future．（ ）
A．appearB．appeared
C．will appearD．is appearing
It rained ______ and lasted for a long time yesterday．
Too bad!Even some streets were full of water．（ ）
A．hardlyB．stronglyC．terribleD．heavily