2 . Never in the history of Irish schools rugby has there been such a scene ______ was witnessed in Musgrave Park yesterday when the Clayton Hotels Munster Junior Cup tie between Presentation Brothers College and St Munchin’s College was hit by 3 serious injuries.

A．as

B．that

C．which

D．who

3 . There seems to be an intimate connection between learning and motivation, two different facets of what dopamine does, says Vanessa Ruta, ______ published the findings in Nature Neuroscience.

A．as

B．that

C．which

D．who

4 . My father, ______ was often the case, came with me to grocery shops and taught me how to pick out produce by smell and touch.

A．as

B．that

C．what

D．who

5 . Oh my goodness, am I lucky that she planted the trees under ______ shade I now sit?

A．which

B．whom

C．that

D．whose

6 . Health officials warn that easing measures too quickly ______ a W-shaped recovery, ______ a resurgence of cases causes a second economic decline soon after the first.

A．is risked; which

B．will risk; which

C．risks; where

D．risked; where

7 . Welcome to our tutorial center, and let me introduce our course. From Monday to Friday, the first class ______ at 4:10 p.m., and the last class ______ at about 8:40 p.m., each class lasting 1 hour with a 10-minute break in middle.

A．will begin; will end

B．began; ended

C．begins; ends

D．has begun; has ended

8 . By April 24, it was reported that more than 589,000 Koreans ______ in large walk through facilities that delivered quick results.

A．would test

B．were tested

C．tested

D．had been tested

9 . Behind the chain of crises ______ the competition between countries for development space and oil control.

A．is

B．are

C．were

D．being