You have joined so many clubs． I'm afraid you'll be too tired． Remember ____________．
Thanks， Dad． I can look after myself very well． （ ）
A．many hands make light work
B．you can't burn the candle at both ends
C．the early bird catches the worm
D．practice makes perfect
﹣Karl Marx is a great thinker． Do you know ？
﹣In 1818．（ ）
A．where he was from
B．when he was born
C．how he learned foreign languages
Yuan Longping is a Chinese rice scientist is leading a search to develop "sea rice"．（ ）
A．whoB．whichC．whom
Grandma wants to watch the program legal Report． Please the TV．（ ）
A．turn offB．turn onC．turn down
Paper﹣making by the Chinese in the Western Han dynasty（朝代）．（ ）
A．is inventedB．invented
C．was invented
﹣I don't know how to use the App Fun Dubbing．
﹣Ask Jimmy for help． He has lots of in doing it．（ ）
A．experienceB．troubleC．courage