I lost my way in complete darkness and, ____ matters worse, it began to rain.
| A．making | B．to make | C．made | D．having made |
within
| A．depth | B．youth | C．bathe | D．wealth |
around
| A．tough | B．count | C．cough | D．routine |
cheese
| A．radios | B．aside | C．adjust | D．diverse |
wander
| A．absorb | B．wallet | C．village | D．salary |
_________ that causes heavy haze sweeping over china remains unknown to many scientists.
| A．what it is | B．what is it |
| C．who is it | D．who it is |