It is the third time that he _________ late for school.
| A．was | B．is | C．had been | D．has been |
---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 |