I was enjoying my dinner and talking to my American friend Janice at the table _______ I noticed people staring at us.
| A．until | B．as | C．when | D．while |
If ____unsolved, the problem of food safety may lead to more serious results.
| A．left | B．making | C．remained | D．taking |
Jack is late again. It is ____of him to keep others waiting.
| A．normal | B．ordinary | C．common | D．typical |
Though________money, his parents managed to send him to university.
| A．lacked | B．lacking of | C．lacking | D．lacked in |
It’s funny that Howard___ speak to you like your boss.
| A．might | B．would | C．should | D．must |
Helen has ____French and can speak fluently after a short stay with her aunt in Paris.
| A．picked up | B．taken up | C．put up | D．made up |