His wife has left him, but he behaved _______ nothing had happened.
| A．even though | B．as soon as | C．as though | D．as long as |
I haven’t decided _____ hotel to stay at.
| A．which | B．what | C．at which | D．where |
. Evidence came up _____ specific speech sounds are recognized by babies as young as six months old.
| A．which | B．what | C．that | D．when |
We decided to ______ a chance on the weather and have the party outdoors.
| A．make | B．take | C．have | D．pick |
The thief had himself _____ by the police when he was trying to break into the hotel.
| A．to spot | B．to be spotted | C．spotted | D．being spotted |
The reason was _____ I was busy with my work at that time.
| A．why | B．because of | C．that | D．what |