She is＿＿＿＿＿new comer to＿＿＿＿chemistry but she has already made some important discoveries．
| A．the； the | B．the；／ | C．a；／ | D．a； the |
______, I came to realize that my parents could not always stand by me.
| A．As time gone by | B．With time going by |
| C．As time going by | D．With time gone by |
In my opinion, more attention should be ______ the environment, which is of great importance.
| A．paid to protecting | B．paid to protect |
| C．paying to protect | D．paying to protecting |
I owe my success to Mr. Smith, a teacher from America, ______ help I have greatly improved my oral English.
| A．by which | B．by whose | C．with his | D．with whose |
Many species are in ______ danger of extinction now due to the foolish actions of ______ human race.
| A．the; the | B．不填; the |
| C．the; 不填 | D．不填; 不填 |
— A nice day, isn’t it?
—Yes, it’s ______ that I’d like to go out for a picnic.
| A．such nice weather | B．so a nice weather |
| C．such a nice weather | D．so nice weather |