A number of countries have issued warnings against travel to Wuhan and China. Travelers who havevisited Mainland China have been asked to __26__ their health for at least two weeks and contact theirhealthcare provider to report any symptoms of the virus. Anyone who suspects that they are carrying thevirus is advised to wear a protective __27__ and seek medical advice by calling a doctor rather than directlyvisiting a clinic __28__. The travel sector has been providing refunds and no-fee __29__ for reserved flightsor tours to China. Airports and train stations have implemented temperature checks and health declarations inan attempt to identify __30__ of the virus.
【題組】26.
(A) screen
(B) monitor
(C) strengthen
(D) improve