将5.4 g Al 投入到200.0 mL 2.0 mol·L-1的某溶液中有氢气产生，充分反应后有金属剩余。该溶液可能为
| A．HNO3溶液 | B．Ba(OH)2溶液 | C．H2SO4溶液 | D．HCl溶液 |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A．Go ahead | B．Yes, my pleasure |
C．Yes, I do | D．Come on |
It’s high time you had your hair cut ; it’s getting _______ . 
| A．too much long | B．much too long |
C．long too much | D．too long much |