______ more attention, the tree could have grown better.
| A． Given | B． To give | C． Giving | D． Having given |
Although I majored in English, language _______ became a challenge when I set foot in the USA for the first time.
| A．luckily | B．naturally | C．surprisingly | D．gradually |
Reading provides quiet, peaceful time alone and can be a good _______ from your busy life.
| A．shelter | B．escape | C．absence | D．departure |
Don't pretend ________ when you don't.
| A．knowing | B．know | C．to know | D．to knowing |
There are forty-five students _______ in our class.
| A．about | B．or so | C．around | D．so |
—By the way，have you moved into the new house?
—Not yet．The walls ________．
| A．were painted | B．are being painted | C．are painted | D．are painting |