We now have______fast ways of traveling that this big ocean seems to have grown smaller.
A. so
B. such
C. so a
D. such a
下列权属中，在中国土地一级市场上交易的是()
A. 土地所有权
B. 土地使用权
C. 土地开放权
D. 土地收益权
______for his help, we couldnt have overcome the difficulties.
A. Weren"t it
B. Hadn"t it been
C. Had it not been
D. Without it
This is the house______we wrote to you.
A. that
B. which
C. about that
D. about which
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