_________ say the English is too difficult for us to learn． We can learn it well with efforts．（ ）
A．AlwaysB．SometimesC．SeldomD．Never
What our society is like is decided by____ everyone chooses to behave．（ ）
A．whereB．whenC．howD．why
The Birdwatching Society goes to Zhalong Nature Reserve___ the birds every year．（ ）
A．to countB．countingC．countD．counts
Although Zhong Nanshan knows the new virus is more____ to old people， he cares little for his own safety．（ ）
A．politeB．dangerousC．friendlyD．important
It is said that Yancheng﹣Nantong High﹣speed Railway _______ in December， 2020．（ ）
A．completeB．is completed
C．was completedD．will be completed
My mother said you went on a Silk Road trip last year．
Yes， it ______ a wonderful trip．（ ）
A．isB．wasC．will beD．were