【单选题】
文法G【S】=（{b}，{S，B}，S，{S→b│bB，B→bS}），该文法所描述的语言____。
①
L(G[S])={b2i+1│i≥0}
②
L(G[S])={b2i+1│i≥1}
③
L(G[S])={bi│i≥0}
④
L(G[S])={b2i│i≥0}
【单选题】
Every one was ____that day.
①
in great spirit
②
in all spirit
③
in high a spirit
④
in high spirit
【单选题】
3．John, look at the time.____you play the piano at such a late hour
①
Must
②
Can
③
May
④
Need
【单选题】
26.The meeting was put off because we ________ a meeting without John.
①
objected having
②
were objected to having
③
objected to have
④
objected to having
【单选题】
There is_______ coffee in this glass as in that one.
①
five times as many
②
five times as much
③
five times than
④
five times more