The temperature is high enough ________water into vapor(蒸汽).
The Bakers intend to buy a house but _____ must be within their power.
Fully ______in preparing teaching assignment at school,she no longer has much time to enjoy the various activities as usual.
---Where is your report of this month?---Oh sorry,I______ to email to you.
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.
EBOLA(埃博拉) is said_______ another big health challenge to our humans over the past several months .