The research lacks evidence, and therefore, its conclusions are doubtful.
| A．solid | B．fierce | C．severe | D．potential |
At the meeting，Tom ________an idea about how we could get enough money to help those in trouble.
| A．came up to | B．came up | C．came out | D．came up with |
________taller of the two girls is my daughter who was made ________monitor yesterday.
| A．The；the | B．The；/ | C．A；a | D．A；/ |
—How did she get infected?
—She _______ the viruses without any protection．
| A．exposed to | B．had exposed to |
| C．was exposed to | D．been exposed to |
The teacher told Tom to sit ______ in class.
| A．hard | B．hardly | C．straight | D．straightly |
________ at the party, I found Tina seated alone in the front row.
| A．Arriving | B．To arrive | C．Arrive | D．Arrived |