| We believe scientists will _____ a way to solve the problem of airpollution. |
A. set off B. put off C. come up with D. catch up with |
| —Can you understand what I meant? —Sorry, I can _____ follow you. |
A. always B. almost C. nearly D. hardly |
| We believe scientists will _____ a way to solve the problem of airpollution. |
A. set off B. put off C. come up with D. catch up with |
| —Can you understand what I meant? —Sorry, I can _____ follow you. |
A. always B. almost C. nearly D. hardly |