As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.
| A．original | B．alternative | C．convenient | D．staple |
---Where is your report of this month？
---Oh sorry，I______ to email to you.
| A．forget | B．have forgotten |
| C．forgot | D．was forgetting |
She is always the first staff to go to the office and the last to leave，______ I guess is why she is promoted so quickly.
| A．who | B．which | C．that | D．what |
EBOLA（埃博拉） is said_______ another big health challenge to our humans over the past several months .
| A．becoming | B．to become |
| C．having become | D．to have become |
Nowadays ______idea is always flashing across his mind that he should fix______time
for another trip with his family.
| A．the；a | B．an；/ | C．/；a | D．the；/ |
______our students need in the process of their preparations for NMET is time, health
and perseverance，the teachers stress.
| A．That | B．What | C．As | D．Whether |