70. The museum is ___ far ____ it will take us half an hour to get there by bus.
A. such... that B. as...as C. so...that D. so … as
69. We'll go and see the patient ___we are busy.
A. even if B. for C. if D. while
68. ___ he has finished writing the novel is unknown.
A. If B. Whether C. When D. While
67. ___ it was already dark, they went on working in the fields.
A. If B. Whether C. But D. Though
66. You will find friendly people ___ you go in China.
A. where B. and C. wherever D. so