——There must be a dozen pens in this house but I can never find one when I need one.
——Keep looking. ____ is sure to turn up.
_____the activities might seem childish, actually they require a lot of strength and determination.
| A．Since | B．Although | C．Before | D．If |
You needn't have apologized for your absence_______, it' s hardly your fault.
| A．besides | B．therefore | C．however | D．meanwhile |
_____ in 2011, the Beijing-Shanghai high-speed railway has benefited Qufu a lot.
| A．To complete | B．Completing | C．Having completed | D．Completed |
If you can't __ your shyness, you'll never pass the English oral test.
| A．take off | B．get over | C．break off | D．give away |
Because the head-teacher had some important guests to meet, the meeting only _______a few minutes.
| A．kept | B．continued | C．lasted | D．covered |