Smoking, _______ is a bad habit, is, however, popular.
| A．that | B．which | C．it | D．though |
A good teacher must be able to hold his students’ attention ____ he reaches the end of the class.
| A．when | B．after | C．until | D．unless |
Though the novel had a happy ending, the readers were left ____.
| A．to be satisfying | B．unsatisfying |
| C．unsatisfied | D．being satisfied |
I would appreciate ______ very much if you could give me some suggestions.
| A． this | B． it | C． that | D． you |
Good news! The price of all those second-hand goods is ______ before.
| A．30% as lower as | B．30% lower than |
| C．lower 30% than | D．as 30% low as |
Bungee is an adventurous sport, popular with young guys, _____ courage matters more than strength.
| A．where | B．that | C．which | D．whose |