( ) 28. Things fall to the ground _______ go up into the air because of gravity.
| A．instead of | B．than | C．rather than | D．in place of |
The plane cannot ______ or land safely every time.
| A．take in | B．take on | C．take over | D．take off |
______ Chemistry is a branch of Chemistry.
| A．Applying | B．Apply | C．Applied | D．Applicant |
Every means ______ tried but without any result.
| A．have been | B．is to be | C．are to be | D．has been |
—My daughter lived in France for five years and now she's working in a foreign company.
—______is no wonder that she speaks such excellent French.
| A．It | B．There | C．That | D．This |
The boy said sadly，“No one can tell ______ will happen next.”
| A．what | B．when | C．who | D．where |