---You didn’t lock the back door.
---You are wrong. I ______.
| A．have locked it | B．lock it myself |
| C．did lock it | D．do lock it |
______ a mile in the fastest time while doing gymnastically correct lunges is yet another event______ Ashrita is outstanding.
| A．Covering; in which | B．Covering; which |
| C．Having covered; in which | D．To cover; that |
Early peoples moved around, ______ the herds of animals.
| A．having followed | B．followed |
| C．following | D．to follow |
______ takes a lot of concentration and a great sense of balance to stay on it.
| A．It | B．This | C．What | D．That |
The questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.
| A．mainly | B．punctually | C．approximately | D．precisely |
—Where is Mother?
—She is in the kitchen. She ______the housework all morning.
| A． does | B．has been doing | C．has done | D．was doing |