It was nothing but his ten years of hard work that _______ his success in his research.
| A．referred to | B．applied to | C．led to | D．appealed to |
Sam managed to keep in __________ contact with his family while he was working in New Zealand.
| A．pleasant | B．confident |
| C．constant | D．different |
In such dry weather, the flowers will have to be watered if they __________
| A．have survived | B．are to survive |
| C．would survive | D．will survive |
The 5-year-old boy was the only one of the 115 passengers to __________ the terrible plane crash.
| A．remain | B．survive |
| C．afford | D．live |
He liked reading but his family couldn't __________ to send him to the school.
| A．attend | B．afford |
| C．avoid | D．allow |
If your parents couldn't __________ to send you to college, you may ask our national Hope Project for help.
| A．afford | B．assist |
| C．apply | D．achieve |