That hazy（雾霾）weather has hit 104 cities in middle-east China lately makes citizens well aware of
______a terrible problem China is faced with.
| A．what | B．how | C．which | D．that |
Despite their______ of interest，Fleming kept trying to develop the chemical ______ it would be safe and effective.
| A．lacking；in order to | B．lack；so that | C．lack；so as to | D．lacking；so that |
Helen always helps her mother even though going to school ______ most of her day.
| A．takes up | B．makes up | C．saves up | D．puts up |
We regret to inform you that there are no tickets ______ for Friday's performance.
| A．available | B．useful | C．convenient | D．affordable |
Mr.Wang ______ two boys to send the sick boy to the nearest hospital.
| A．arranged | B．has arranged | C．had arranged for | D．has arranged for |
My teacher's rich knowledge of science ______ my decision ______ study science.
| A．influenced；to | B．influenced；on |
| C．has influenced；with | D．influences；on |