About 170 people _____ and dozens more _____ after a flood hit an Indonesian town last week.
| A．were killed; are still missing | B．have been killed; were still missing |
| C．are killed; are still missing | D．had been killed; were still missing |
His brother __ a lot of silkworms last summer.
| A．rose | B．fed | C．raised | D．grew |
On the wall __ two large portraits.
| A．hangs | B．hang | C．hanged | D．hanging |
Sunglasses can ___ us from strong sunlight.
| A．hold | B．prevernt | C．protect | D．make |
His father feels ___ his duty to help others.
| A．this | B．it | C．that | D．what |
I regret ___ harder in the past two years.
| A．not having studied | B．having studied | C．having not studied | D．not being studied |