Experts say it is an international trend to __________ MP2.5 to check air quality.
| A．adapt | B．attach | C．adopt | D．adjust |
Her spirits remained up __________ her disappointment.
| A．in spite of | B．due to | C．so long as | D．as well as |
Do you _____________ they play the same song again and again over the radio?
| A．hate that | B．hate it for | C．hate it when | D．hate |
Bats are surprisingly long-lived creatures, some____________ a life span of around 20 years.
| A．have | B．had | C．to have | D．having |
Had they known what was coming next, they ___________ second thoughts.
| A．may have | B．could have | C．must have had | D．might have had |