Questions149~150 refer to the following notice.
Entering the main building using a chip card is a simple and secure process for staff members. Here are the steps to follow:
1.Hold your chip card close to the card reader, with the chip facing towards the reader. Wait for the reader to beep and display a green light, indicating that your card has been successfullyread and accepted. 2.Wait for the gate to open fully before proceeding through it.3. If you experience any issues with the card reader, contact the building security team for assistance. 
Remember to keep your chip card secure and report any lost or stolen cards immediately to prevent unauthorized access to the building.
【題組】149.What should you do if the gate has not fully opened after the card reader has accepted your chip card?
(A)Attempt to enter the building before the gate has fully opened.
(B)Walk away and try again later.
(C)Use another staff member's chip card to try to open the gate.
(D)Wait for the gate to open fully before proceeding through it.