33. You can, __________ the sky is clear, see as far as the old temple on top of the mountain, but not today.
| A．when | B．where | C．though | D．Because |
No wonder he looks tired! He’s been studying for the exams all week, ____ he’s been working in a bar at night.
| A．while | B．but | C．plus | D．as |
____ quiet, for, you see, the baby is sleeping!
| A．To keep | B．Keep | C．Keeping | D．Kept |
Sadly, ____ I remember was a beautiful lake two years ago is now a smelly wasteland.
| A．where | B．what | C．which | D．there |
One of the advantages with the new tool is that it is users ____. Users can handle it with less effort and more convenience.
| A．friendly | B．good | C．well | D．pleased |
Suspecting him of robbing the bank, the Security Police were ___ his phone calls.
| A．looking | B．glancing | C．monitoring | D．staring |